CVE-2025-66421Network attack vector

Stored XSS via unescaped completion values

Published Nov 30, 2025 · Updated Nov 30, 2025

Stored XSS in Tryton Sao before 7.6.11 allows remote authenticated users to execute JavaScript through crafted completion values. Completion content, generally an editable record name, is inserted without escaping, so embedded JavaScript runs in Sao's browser context. Successful exploitation requires a user to view the malicious completion and exposes sensitive data, including the session.

CVSS severity5.4
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Tryton Sao before 7.6.11 allows remote authenticated users to execute JavaScript through crafted completion values. Completion content, generally an editable record name, is inserted without escaping, so embedded JavaScript runs in Sao's browser context. Successful exploitation requires a user to view the malicious completion and exposes sensitive data, including the session.

The record

CVE
CVE-2025-66421
Published
Nov 30, 2025
Updated
Nov 30, 2025
Vendor
Tryton
Product
Sao
Classifications
CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.0.69
  2. Affected versionversion=7.0.0 <7.0.40
  3. Affected versionversion=7.1.0 <7.4.21
  4. Affected versionversion=7.5.0 <7.6.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tryton · Saoversion=0 <6.0.69; version=7.0.0 <7.0.40; version=7.1.0 <7.4.21; version=7.5.0 <7.6.11

Published CVSS scores

5.4MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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